S29AL032D datasheet(38/69 Pages) SPANSION

38 / 69 page

S29AL032D

S29AL032D_00_A3 June 13, 2005

Advan ce

In form ati o n

within erase-suspended sectors produces status data on DQ7–DQ0. The system can use DQ7, or

DQ6 and DQ2 together, to determine if a sector is actively erasing or is erase-suspended. See

Write Operation Status on page 39 for information on these status bits.

After an erase-suspended program operation is complete, the system can once again read array

data within non-suspended sectors. The system can determine the status of the program opera-

tion using the DQ7 or DQ6 status bits, just as in the standard program operation. See Write

Operation Status on page 39 for more information.

The system may also write the autoselect command sequence when the device is in the Erase

Suspend mode. The device allows reading autoselect codes even at addresses within erasing sec-

tors, since the codes are not stored in the memory array. When the device exits the autoselect

mode, the device reverts to the Erase Suspend mode, and is ready for another valid operation.

See Autoselect Command Sequence on page 32 for more information.

The system must write the Erase Resume command (address bits are don’t care) to exit the erase

suspend mode and continue the sector erase operation. Further writes of the Resume command

are ignored. Another Erase Suspend command can be written after the device has resumed

erasing.

Notes:

1. See Table 17 for erase command sequence.

2. See DQ3: Sector Erase Timer on page 44 for more information.

Figure 5. Erase Operation

START

Write Erase

Command Sequence

Data Poll

from System

Data = FFh?

Yes

Erasure Completed

Embedded

Erase

algorithm

in progress

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